Comparison between Different Methods for Fatigue Life Prediction of Bogie Beams
نویسنده
چکیده
The life time predictions made with the modified HdM-method agreed rather well with experimental results for the first type of bogie beams, while the method underestimated the fatigue life for the bogie beams of the second type with a factor of up to 50. This is probably due to differences between the two types of load sequences used during the two tests in variables, such as irregularity factor and block length. The life times for the second type of bogie beams were rather short compared to the block length which led to a situation where the level of the crack closure stress was not constant during the test. Both the S-N method and the fracture mechanics method overestimated the fatigue life of both types of bogie beams.
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